公开(公告)号：CA2826635A1

公开(公告)日：2012-10-11

申请号：CA2826635

申请日：2012-04-02

Applicant: BASF SE ,  BASF CANADA INC

Inventor： REICHENBACH-KLINKE ROLAND ,  ASMANN ANDREA ,  LANGLOTZ BJORN ,  SPINDLER CHRISTIAN ,  GIESBRECHT RUSSELL

IPC: C09K8/588

Abstract: The present invention relates to a process for producing mineral oil from underground formations, wherein, in one process step, permeable regions of the underground formation are blocked by injecting aqueous formulations of hydrophobically associating copolymers into the formation.

公开(公告)号：CA2818089A1

公开(公告)日：2012-05-31

申请号：CA2818089

申请日：2011-11-02

Applicant: BASF SE

Inventor： REICHENBACH-KLINKE ROLAND ,  LAFUENTE CERDA OSCAR ,  ASSMANN ANDREA ,  LANGLOTZ BJORN

IPC: C08F220/00 ,  C08F220/06 ,  C08F220/56 ,  C08F220/58

Abstract: What is proposed is the use of a water-soluble hydrophobically associating copolymer as an additive in the development, exploitation and completion of underground mineral oil and natural gas deposits and in deep drillings, wherein the copolymer comprises (a) at least one monoethylenically unsaturated monomer (a) selected from H2C=C(R1)-R4-O-(-CH2-CH2-O-)k-(-CH2-CH(R3)-O-)i-R5 (I), and/or H2C=C(R1)-O-(-CH2-CH2-O-)k-R2 (II), and (b) at least one monoethylenically unsaturated, hydrophilic monomer (b) different from monomer (a), wherein the copolymer is obtainable through copolymerization of the monomers (a) and (b) in the presence of at least one surfactant (c).